From 27c4a3318f716cce0a23248317534bda7792230b Mon Sep 17 00:00:00 2001
From: Simon Glass <sjg@chromium.org>
Date: Thu, 19 Apr 2012 08:04:39 +0000
Subject: [PATCH] tegra: Correct PLL access in ap20.c and clock.c
Correct this warning seen by Albert:
ap20.c:44:18: warning: array subscript is above array bounds
There is a subtle bug here which currently causes no errors, but might
in future if people use PCI or the 32KHz clock. So take the opportunity
to correct the logic now.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>
---
arch/arm/cpu/armv7/tegra2/ap20.c | 6 ++++--
arch/arm/cpu/armv7/tegra2/clock.c | 4 ++--
arch/arm/include/asm/arch-tegra2/clock.h | 5 +++--
3 files changed, 9 insertions(+), 6 deletions(-)
diff --git a/arch/arm/cpu/armv7/tegra2/ap20.c b/arch/arm/cpu/armv7/tegra2/ap20.c
index 698bfd0e17..24e582d95c 100644
--- a/arch/arm/cpu/armv7/tegra2/ap20.c
+++ b/arch/arm/cpu/armv7/tegra2/ap20.c
@@ -77,8 +77,10 @@ static int ap20_cpu_is_cortexa9(void)
void init_pllx(void)
{
- struct clk_rst_ctlr *clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
- struct clk_pll *pll = &clkrst->crc_pll[CLOCK_ID_XCPU];
+ struct clk_rst_ctlr *clkrst =
+ (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
+ struct clk_pll_simple *pll =
+ &clkrst->crc_pll_simple[CLOCK_ID_XCPU - CLOCK_ID_FIRST_SIMPLE];
u32 reg;
/* If PLLX is already enabled, just return */
diff --git a/arch/arm/cpu/armv7/tegra2/clock.c b/arch/arm/cpu/armv7/tegra2/clock.c
index ccad351639..602589cde0 100644
--- a/arch/arm/cpu/armv7/tegra2/clock.c
+++ b/arch/arm/cpu/armv7/tegra2/clock.c
@@ -426,7 +426,7 @@ static struct clk_pll *get_pll(enum clock_id clkid)
struct clk_rst_ctlr *clkrst =
(struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
- assert(clock_id_isvalid(clkid));
+ assert(clock_id_is_pll(clkid));
return &clkrst->crc_pll[clkid];
}
@@ -439,7 +439,7 @@ int clock_ll_read_pll(enum clock_id clkid, u32 *divm, u32 *divn,
assert(clkid != CLOCK_ID_USB);
/* Safety check, adds to code size but is small */
- if (!clock_id_isvalid(clkid) || clkid == CLOCK_ID_USB)
+ if (!clock_id_is_pll(clkid) || clkid == CLOCK_ID_USB)
return -1;
data = readl(&pll->pll_base);
*divm = (data & PLL_DIVM_MASK) >> PLL_DIVM_SHIFT;
diff --git a/arch/arm/include/asm/arch-tegra2/clock.h b/arch/arm/include/asm/arch-tegra2/clock.h
index 1d3ae38644..ff83bbf293 100644
--- a/arch/arm/include/asm/arch-tegra2/clock.h
+++ b/arch/arm/include/asm/arch-tegra2/clock.h
@@ -186,8 +186,9 @@ enum periph_id {
/* Mask value for a clock (within PERIPH_REG(id)) */
#define PERIPH_MASK(id) (1 << ((id) & 0x1f))
-/* return 1 if a PLL ID is in range */
-#define clock_id_isvalid(id) ((id) >= CLOCK_ID_FIRST && (id) < CLOCK_ID_COUNT)
+/* return 1 if a PLL ID is in range, and not a simple PLL */
+#define clock_id_is_pll(id) ((id) >= CLOCK_ID_FIRST && \
+ (id) < CLOCK_ID_FIRST_SIMPLE)
/* PLL stabilization delay in usec */
#define CLOCK_PLL_STABLE_DELAY_US 300
--
2.39.5